Lighting fixture and the like



Nov. 27, 1928.

D. HOLT LIGHTING FIXTURE AND THE LIKE Filed May 23, 1 2 Sheets-Sheetfiolzazi Off, LWQ

Nov. 27, 1928. 1,693,443

D. HOLT -LIGHTING FIXTURE AND THE LIKE Filed May 23, 1927 2 Sheets-Sheet2 Patented Nov. 27, 1928.

UNITED STATES DONALD HOLT, OF CHICAGO, ILLINOIS.

LIGHTING FIXTURE AND THE LIKE.

Application filed May 23, 1927. Serial No. 193,555.

This invention'has to do with certain improvements in lighting fixtures.The lighting fixtures'herein disclosed are of that general type in whichuse is made of a bracket arm provided with proper-supporting meanswhereby one end is supported upon or attached to any suitable article ofsupport such as a desk, table, wall, machine tool, lathe, or othersupport whatsoever.

The features of the invention have reference particularly to theconstruction of the bracket arm, and the manner in which the varioussections thereof are related to each other and retained in properharmonious relationship. The invention also relates to the manner inwhich the different sections of the arm are connected or joinedtogether; and more particularly, to the construction disclosed wherebysaid sections are provided with the necessary co-operation to insure thedesired amount of resistance between them to retain them in whateverrelative positionmay be decided upon.

A further feature of the invention relates to the provision of aconstruction such that the various sections may lie-adjusted withrespect to each other without an excessive amount of binding betweenthem, and constructions such that sections will remain securely set'inwhatever relative positions may be decided upon.

A further feature of the invention relates to the provision of astructure of such form that it can be readily made up from sheet metalstampings or punch press parts; and also of such construction that theparts may be very cheaply manufactured in quantities and may be readilyassembled at a very low labor cost. A further object of the invention isto provide a structure which will be very durable and well adapted towithstand the relatively rough service which is mm encountered bydevices of this kind.

Other objects and uses of the invention will appear from a detaileddescription of the same which consists in the features of constructionand combinations of parts hereinafter described andclaimed.

In the drawings:

Figure 1 shows a side elevation of the ped estal unit and the pedestaljoint of a structure embodying the features of the present invention;

Fig. 2 shows a cross section on the line 22 of Fig. 1 looking in thedirection of the arrows;

Fig. 3 shows a horizontal section on the line 33 of Fig. 2, looking inthe direction of the arrows;

Fig. 4 shows a side view of one of the intermediate joints, the attachedtube arms being broken away so as to shorten up the figure;

Fig. 5 shows a cross section on the line 55 of Fig. 4 looking in thedirection of the arrows;

Fig. 6 shows a face view of the serrated disk of one of the jointmembers, being in effect a section on the line 66 of Fig. 5, looking inthe direction of the arrows;

Fig. 7 shows a face view of the serration claws of one of the jointmembers, being in effect a section on the line 7-7 of Fig. 5 looking inthe direction of the arrows;

' Fig. 8 shows a fragmentary horizontal section on the line 88 of Fig. 1looking in the direction of the arrows;

Fig. 9 shows a fragmentary horizontal section on the line 9-9 of Fig. 4looking in the direction of the arrows;

Fig. 10 shows a fragmentary view of the pivotal stud of one of the jointsections, showing the cup and the serrated disk plate also'infragmentary section;

Fig. 11 shows a detailed elevation of a joint section having attachedthereto a nipple for supporting a lamp socket; and

Fig. 12 shows a fragn'ientary section on the line l212 of Fig. 11looking in the direction of the arrows.

The pedestal 15 is of suitable construction for application to a table,desk, lathe, machine tool, or other article to which the device is to beattached. In some cases the attachment will be made by means of screwspassed through holes 16 in the pedestal member, whereas in other casesthe pedestal itself will be made of sufficient size and shape toproperly support the device without the necessity of such screws.

There is a boss 17 reaching centrally upwards from the pedcsta l. A pin18 reaches reltically through said boss, the pin being pivotally mountedwithin the boss. This pin is provided with a flange 19 establishing ashoulder which rests against the top surface of the boss; and a nut- 20threaded onto the bottom end of the pin is drawn tightly against ashoulder on the lower end of the pin before the nut binds against thepedestal. Consequcntly, the pin is effectively held in place but isallowed to turn freely.

A clip 21 is placed around the upper end of In addition to theioregoing,

' are then folded outwardly at right afiglesito' the extension and thusinto parallel with eachother as clearly evident from 8.

The pedestal joint memberQ L-includesa pair of cups and 26. Thesecupsare slight- 2.- The rage-23am (if-the clip 21 have their extreme endsturned outwardly at right i'th'eh ''itend'cl through si it'abre'holes-in the capes and t lrnj a 're rive ed or anded siy astd'lbck theelip'to the cup 25'.

may be passed through the ears-22 and 23 and through the cu'p 25 soazs-to still more seti'irety lockth parts together.

A stud 31' (seeF -yijlofor the'detailed constructioir thereof) 'ha's a?flan e 32 adjacent to one end; which en'd" is pre'fera'bly eithersquared or"p iovided' with-fl ttened surfaces as shown in Fig. 10. Thissquared (Br-fiat tened end of the stud 31 is then passed through a holeinspending shape so that the stud cannotrotate with respect-to said-cup;Kloekirutfii'is threaded on I 32 up solid and thus lock the stud tothecup:

- Before setting the stud through thecup'25,

a flangemember 35'- is seti'n pllaee within-the.

cup. 3 Said flange gmembe'r has its central portion 36 which :setsbehind the flange 32- of the stud as clearly shown in Figl"; 10;:sothati when the nut Be is drawn upsolid said flange is looked in'place.

The peripheral outwardly t'ieiirg portion 37 of the flange 35 isserrated asclearlfi, shown in Figs; 2 and 6;:and due to the offset hubportion- 36 this'serrated surface is brought substantially to the medialplane of the structure.-

A claw member 38 (best shown in' Figs. 2 and 7) is secured to thecentral portion of the cup 26. Said member includes a central hub 39which is perforated to receive the stud 31. together with a: seriesofr'adial arms 40, said arms being deflected outwards away from thecentral hub portion 39 as clearly shown in Fig. 2. The outer ends ofthese arms are provided with sidewise reae'hing claws A which areadapted to engage the serrations of the. serrated plate 35; and 'duetothepresence of theztrms 40 which are made of spring metal. theengagement with-the serrations will be of such a nature that the partswill stay in' whateier p'osi'tion is desired with a considerable amountof resistance. .but nevertheless the parts can be turnedwith respect toeach other upon the application of considerable force.

Elie-hub portion 39 isprovided with a p'ai r thereon. This clip has a'rivets 29 anktgtl' to'tlie stu'd so as todralw the flange dished outor'ottsetto estabiish a hub of bapliwardly reaching fingers 42 (see Fig.2)- which pass through corresponding perforations in the cup 20.Consequently the clawsare compelled to turn back and forth in'harino'iir\i'itlfthe cup 26.

A look nut 43 is threaded onto the projecting end of the stud 31 and isdrawn solidly against the shoulder 4% on the end of said stud sons tolock the two cups together. 7

Preferably,- the Stud iscntrall y bored or perforated as shown at 45 soast'o allow the g'iies' ifi to be passed through the'jofiii'it llili1'Two or more of said joint niinbers may he connectcdtogether by means oftubular es tensionssuch as 47, by the usect clips 48 sinii lar tothe'clip 21 already" described} aiidotli'er joint members 49 may belocated ifiterm'di atebe'tween' the pairs of tubular arms so as topermit said arms to bereadily turned with re: spect to each other. I donot deem it neces sary however to explain all of these structures indetail inasmuch as they constitute largely a repetition of thestructures already explained.

I will state however that in attaching each of the clips 48 to the endportion of itstnbular arm 47 I prefer to pinch or otherwise upset themetal of the arm at one or more points close to the position of theclip-48 (as shown' at50 in Fig. 4), the ears thus established set tingdown into small notches 51 in the end (it the clip, all of which willbest understdod in examination of Figs. 4 and 9. he end portions of thetubularextcn'siohs 47 may also be upset or riveted as shown at 52 so asto lock the clips 48 in place.

If desired will be driven into the end portions of the tubularextensions so as to provide a satisfactory finish and lining andalso'tfi prevent unnecessary wear on the wires and the (langcr of shortcircuits.-

As shown in Figs. 11 and 12 a specially formed clip 54 may be connectedto one of the joint members. said clip being provided with an extension55 of slightly reduced size and circular form, which extension ma bethreaded to receive a suitable lamp socket or other fixture. A-s alsoshown in Figs. ll and 12 this special clip 54 is made of a. single pieceof metal folded into the desired shape.

In order to retain the pin 18 against free rotation the boss 17 may beprovided with an inwardly reaching socket 136. the inner end of whichterminatesat a shoulder 57 (see Figs. 2 and 3). A small pin 58 is setinto the socket 5G and has a. flanged head 59 which may come to bearagainst the shoulder 57 so as to prevent the pin from being forcedinwardly an extreme distance.

The inner end of the pin is preferably bevltml as shown at (30 to engagethe serration C-l on the pin 18; and a spring 62- setinto'thc socket 56normally presses also fibre or other bushings 5?,

the pin against Hll said serrations. A stud screw 63 is threaded intothe outer end of the socket, 56 so as to retain the spring therein andforce the pin against the serrations under the desired amount of springpressure.

While I have herein shown and described only a single embodiment of thefeatures of my present invention still I do not intend to limit myselfto the same except as I may do so in the claims.

I claim:

1. In a device of the class described the combination with a pedestalmember, of a vertical pin pivotally mounted and extending through thepedestal member, means for securing said pin in place while permittingfree rotation thereof with respect to the edest-al member, the centralportion of said pin being serrated, there being a transversely extendingsocket in the pedestal member having its inner end communicating withthe serrated portion of said pin, a pin within said socket, a springtending to force said pin in wardly against the Vertical pin aforesaid,the inner end of said pin being relatively sharpened to engage theserrations aforesaid and thereby resist the rotation of the pin withrespect to the pedestal while permitting such rotation under appliedforce of sullicient magnitude, a shoulder on said spring pressed pin, anabutment on the pedestal member serving as a stop for said shoulder tolimit inward movement of the spring pressed pin, and suitable joint andextension members supported by the upper end of said pin, substantiallyas described.

2. In a device of the class described the combination with a suitablepedestal member, of a pin pivoted with respect to the same for rotationon a vertical axis, a pedestal joint member comprising a pair ofcompanion disks in close proximity to each other, a stud extendedthrough said disks, a rigid connection between said stud and one of thedisks,

a serrated disk, between the two disks and rigidly connected to thestud, a claw member non-rotatably connected to the other disk, andhaving a series of outwardly and inwardly reaching claw members ofspringy material in engagement with the peripheral portion of theserrated disk, a pivotal connection between the disk to which isattached the claw member, and the stud, and suitable connectionsbet-ween the disks and the pedestal member and the other member,substantially as described 3. In a device of the class described thecombination with a pedestal member and an extension member, of a jointmember intermediate between these two, said joint member comprising apair of companion casing disks, a stud extending through both of thedisks, means for securing the stud rigidly to one disk, a pivotalconnection between the stud and the other disk, a serrated disk rigidlyconnected to the stud and first mentioned disk, and having in itsperipheral portion a series of serrations facing towards the other disk,a claw member intermediate between the serrated face aforesaid and saidother disk and non-rotatably connected to said other disk, and includinga pair of outwardly and forwardly reaching arms of springy materialhaving their end portions provided with claws in engagement with theseries aforesaid, substantially as described.

4. As a new article of manufacture a nipple member adapted to receive alamp socket or the like, said nipple member comprising a single piece ofsheet metal folded into circular form and provided with a pair offorwardly and outwardly reaching ears for attachment to the disk, andthe circularly folded portion having its end of contracted size andthreaded, to receive a lamp socket or the like, substantially asdescribed.

DONALD HOLT.

